Notching device for piping



N M M. H. MERRIAM.

NOTGHING DEVICE FOR PIPING. No. 270,967. Patented Jan.23,1883.

Wfieases. 1710677367".

N. PETERS. Phclo-Lilhognpher. Washingion. I10.

UNITED STATES PATENT OFFICE.

MATTHEW H. MERRIAM, OF LEXINGTON, MASSACHUSETTS.

NOTCHING'DEVICE FOR PIPING.

SPECIFICATION formingpart of Letters Patent No. 270,967, dated January 23, 1883. Application filed November 20, 1882. (No model.)

10 all whom it may concern Be it known that I, MATTHEW H. MER- RIAM, of Lexington, county of Middlesex, and State of Massachusetts, have invented an Improvement in Notching Devices for-Piping, of which the following description,in connection with the accompanying drawings, is a specification,like letters on the drawings representing like parts.

- When leather piping'such as is commonly inserted between layers of leather to form an edge-finish is to be bent to finish square corners it is essential for good work that the inneror unfinished edge of the piping, which is placed between the layers of leather, be notched exactly opposite the corner to enable the piping to be bent at the proper place. To facilitate bending the piping,its inner edge has been provided with a series of V shaped notches; but'this does not always answer the purpose, for it often happens that the notch does not come injustthe proper position with ielation to the corner tobe finished, and hence good and even work cannot be done. In accordance with my plan the piping may be left straight or uncut at its inner edge, and when the piping being applied by stitches arrives at a corner where the piping is to be bentthe operator places under the piping the thin end of one member of the notching device herein described, and moves the other member of the said device down upon the piping, and removes a triangular piece of materialfrom its inner edge at the exact point where the bend is to be made. After this the piping may be bent at just the proper point to be shaped to the corner to be finished.

Figure 1 represents in side elevation a notching device embodying my invention; Fig. 2, a plan of the die part of the underjaw;

Fig. 3, a view of the punching part of the upperjaw; and Fig. 4 shows a piece of material being finished by piping.

My notchingdevice is composed of twojaws,

a and b. Jaw a is provided with a. thin blade,

a which may be readily inserted between the piping and the bed-plate of the sewing-machine, the needle and other partsofwhich are being employed to stitch thepipingd, between two pieces of leather, 6. Jaw b is provided with a punch or male part, b. Letit be supposed that a piece of piping d is being inserted between the edges of two layersof leather 6, and is being stitched between the said layers bya rowof sewing-machine stitches at 9.

When corners such as shown at h i are to be finished or piped, the piping, when imme-' diately opposite the said corners, may be notched by introducing the long, thin die a under the said piping and then causing the jaw 12 and punch b to be moved or shut down upon the piping, cutting out or notching its inner edge, as at 2, Fig. 4, thus enabling the piping to be bent atjust the proper spot.

The long, thin jaw may be inserted under the piping- \vithoutdisturbing it as to its relation to the sewing parts, and without afl'ectiug the continuity of the succession of stitches,

I claim- The notching device composed ofthejaw a, provided with a thin plate ornose,having the die-opening 0, combined with the jaw 1), provided with the punch b, to operate all substantially as shown and described.

In testimony whereof have signed my name to this specification in presence of two subscribing witnesses.

. MATTHEW H. MERRIAM.

Witnesses:

J 0s. P. LIVERMORE, BERNICE J. NoYEs. 

